Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-03-02
Mon.Not.Roy.Astron.Soc. 316 (2000) 433
Astronomy and Astrophysics
Astrophysics
To appear in MNRAS
Scientific paper
10.1046/j.1365-8711.2000.03514.x
The wide-band energy spectrum of NGC6240 over the range 0.5-200keV is investigated using the RXTE and ASCA data. The RXTE data provide the spectrum beyond the ASCA range (0.5-10 keV) with significant detection of signals up to 20keV and the upper limits above 20keV. The spectrum above 10keV is found to be very flat. A strong iron-K emission line discovered in the previous ASCA observation is also confirmed with the RXTE PCA. These results provide further evidence for the dominance of a reflection component, i.e. emission from cool material illuminated by an AGN. By fitting the spectra obtained with RXTE and ASCA simultaneously, we satisfactorily modeled the AGN spectrum with a Compton reflection component and probably a transmitted AGN component penetrating through a thick absorber. The X-ray luminosity of the AGN is estimated to be in the range 4x10^43 - 6x10^44 ergs/s in the range 2-10keV, which categorizes NGC6240 among the most luminous Seyfert nuclei. The ratio of the 2-10keV X-ray luminosity to the infrared luminosity, L_X(2-10keV)/L_IR, is 0.01 - 0.1, which implies a quite substantial, if not dominant, contribution of AGN to the infrared luminosity.
Ikebe Yasushi
Komossa Stefanie
Leighly Karen
Nakagawa Takao
Tanaka Yasuo
No associations
LandOfFree
RXTE observation of NGC 6240: a search for the obscured active nucleus does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with RXTE observation of NGC 6240: a search for the obscured active nucleus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RXTE observation of NGC 6240: a search for the obscured active nucleus will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-501091